PackageDigitalSignatureManager.IsSigned Eigenschaft

public:
 property bool IsSigned { bool get(); };

public bool IsSigned { get; }

member this.IsSigned : bool

Public ReadOnly Property IsSigned As Boolean

Eigenschaftswert

true, wenn das Paket Signaturen enthält, andernfalls false.

Beispiele

Im folgenden Beispiel wird gezeigt, wie Sie mithilfe der IsSigned -Eigenschaft ermitteln, ob ein Paket digitale Signaturen enthält. Das vollständige Beispiel finden Sie unter Erstellen eines Pakets mit einem Beispiel für eine digitale Signatur.

// ------------------------ ValidateSignatures ------------------------
/// <summary>
///   Validates all the digital signatures of a given package.</summary>
/// <param name="package">
///   The package for validating digital signatures.</param>
/// <returns>
///   true if all digital signatures are valid; otherwise false if the
///   package is unsigned or any of the signatures are invalid.</returns>
private static bool ValidateSignatures(Package package)
{
    if (package == null)
        throw new ArgumentNullException("ValidateSignatures(package)");

    // Create a PackageDigitalSignatureManager for the given Package.
    PackageDigitalSignatureManager dsm =
        new PackageDigitalSignatureManager(package);

    // Check to see if the package contains any signatures.
    if (!dsm.IsSigned)
        return false;   // The package is not signed.

    // Verify that all signatures are valid.
    VerifyResult result = dsm.VerifySignatures(false);
    if (result != VerifyResult.Success)
        return false;   // One or more digital signatures are invalid.

    // else if (result == VerifyResult.Success)
    return true;        // All signatures are valid.
}// end:ValidateSignatures()

' ------------------------ ValidateSignatures ------------------------
''' <summary>
''' Validates all the digital signatures of a given package.</summary>
''' <param name="package">
''' The package for validating digital signatures.</param>
''' <returns>
''' true if all digital signatures are valid; otherwise false if the
''' package is unsigned or any of the signatures are invalid.</returns>
Private Shared Function ValidateSignatures(ByVal package As Package) As Boolean
    If package Is Nothing Then
        Throw New ArgumentNullException("ValidateSignatures(package)")
    End If

    ' Create a PackageDigitalSignatureManager for the given Package.
    Dim dsm As New PackageDigitalSignatureManager(package)

    ' Check to see if the package contains any signatures.
    If Not dsm.IsSigned Then
        Return False
    End If
    ' The package is not signed.
    ' Verify that all signatures are valid.
    Dim result As VerifyResult = dsm.VerifySignatures(False)
    If result <> VerifyResult.Success Then
        Return False
    End If
    ' One or more digital signatures are invalid.
    ' else if (result == VerifyResult.Success)
    ' All signatures are valid.
    Return True
End Function
' end:ValidateSignatures()

Hinweise

Die IsSigned -Eigenschaft führt keine Signaturüberprüfungen aus. Wenn Signaturen vorhanden sind und IsSigned vorhanden sind, sind truemindestens eine der Signaturen möglicherweise ungültig. Rufen Sie VerifySignatures auf, um zu bestätigen, dass die Signaturen gültig sind und sich nicht geändert haben.

Gilt für:

Weitere Informationen

• VerifySignatures(Boolean)
• OPC-Spezifikation (Open Packaging Conventions)